CN115772290A - Antibacterial breathable film - Google Patents
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The application discloses an antibacterial and candida albicans-resistant breathable film. The preparation raw materials of the breathable film comprise plastic particles, nano calcium carbonate, an organic antibacterial agent and/or an inorganic antibacterial agent, wherein the plastic particles comprise a polymer a, a polymer b and a polymer c, and the polymer a is polyethylene acrylic acid; the polymer b is PHA or PBAT or any combination thereof; the polymer c is nylon or polyester amide, and the ratio of the polyester amide in terms of the number of carboxyl, amino and hydroxyl is (5-8): 1; the polyesteramide has average molecular weight of 500-1000, melting point of 100-140 deg.c, viscosity of 1-1.75dL/g, and the weight ratio of the organic antibacterial agent to the inorganic antibacterial agent is preferably (6-2): 1. The impact strength of the plastic film is not less than 20J/mm 2 Air permeability not lower than 6500g/m 2 * And the degradation rate is not lower than 70 percent after 24 hours.
Description
Technical Field
The application relates to the technical field of antibacterial plastics, in particular to an antibacterial and anti-candida albicans breathable film and a preparation method thereof
Background
A highly air permeable plastic film is a novel polymer material (resin) developed in the last 90 s, and the polymer material includes polyolefins such as polypropylene resin (PP), low density polyethylene resin (LDPE), linear Low Density Polyethylene (LLDPE); the polyester, polyamide or their composite material formed from polyol and organic acid, and the film produced by using these high-molecular materials through the processes of casting and drawing are known as air-permeable plastic film, and said plastic film has the characteristics of large air-permeable quantity, no water leakage, soft texture, high tensile strength, good sanitary property and quick environmental degradation after being discarded.
With the prevalence of SARS, avian influenza and new crown in recent years, breathable films, especially antibacterial breathable films, are increasingly widely used in the packaging of medical and health products, such as medical adhesive films, surgical gowns, medical gloves, sanitary napkins for women, baby diapers, disposable sheets and other clinical medical consumables, in daily life. Most of the antibacterial and breathable films for sanitary products adopt organic antibacterial agents, because the organic antibacterial agents not only have broad-spectrum and efficient sterilization capability, but also have wide sources, low cost and simple processing technology. The organic antibacterial agent mainly comprises quaternary ammonium salts, guanidines, haloamines, and the like. And the bacteriostatic and bactericidal mechanisms of quaternary ammonium salts and guanidines are similar, because the quaternary ammonium salts or the guanidines contain positive charges, the cell membranes of bacteria have negative charges, and the quaternary ammonium salts or the guanidines are combined through electrostatic attraction to destroy the normal activities of the bacterial cells.
In practice, a particular patient population is patients with Candida albicans infection of the urinary or reproductive system, because Candida albicans infection is secreted in large amounts and causes intolerable itching in private areas. In this group of patients, the recovery of the birth canal injury caused during the production process is not good, and the embarrassment of sneezing and urine leakage is less, so that the requirements of the people on the underpants are that the underpants are breathable and waterproof, and the underpants can also have excellent inhibiting effect on candida albicans. The candida albicans is a main pathogenic bacterium causing mycotic vaginitis, accounts for 80% -90% and is a conditional pathogen, and candida albicans exists in the vagina of 10% -20% of non-pregnant women and 30% -40% of pregnant women. The fungal phase is divided into hyphal phase and spore phase, and if the fungal phase is in the spore phase, the fungal phase does not have the effect of treating diseases, and the hyphal phase is proliferated greatly under proper conditions to cause mycotic vaginitis. In particular, after antibiotics are used, candida albicans (fungi) are proliferated in a large amount due to the killing of normal competitive bacteria, and the result is mycotic vaginitis, so that the relationship between the candida albicans and normal beneficial bacteria in the vagina is shown. There is therefore a need for an antimicrobial fabric that is effective against not only bacteria but also candida albicans.
Disclosure of Invention
In order to solve the problems, the application firstly provides a breathable film with better flexibility, air permeability and degradability, the raw materials for preparing the breathable film comprise plastic particles, nano calcium carbonate, an organic antibacterial agent and/or an inorganic antibacterial agent, the plastic particles comprise a polymer a, a polymer b and a polymer c, and the polymer a is polyethylene acrylic acid; the polymer b is PHA or PBAT or any combination thereof; the polymer c is nylon or polyester amide, and the ratio of the polyester amide in terms of the number of carboxyl, amino and hydroxyl is (5-8): 1; the polyesteramide used has an average molecular weight of 500-1000, a melting point of 100-140 ℃ and a viscosity of 1-1.75dL/g.
By adopting the technical scheme, the impact strength of the plastic film is not lower than 20J/mm 2 Air permeability not less than 6500g/m 2 * And the degradation rate is not lower than 70 percent after 24 hours.
The different proportions of the composition are fully investigated by taking the air permeability, the flexibility and the degradability of the plastic film as performance indexes, and when the plastic particles and the nano calcium carbonateThe dosage ratio is (4-1) to 1; when the polymer b is PBAT and the polymer c is polyesteramide, the impact strength of the plastic film is up to 27J/mm 2 Air permeability as high as 9889g/m 2 * And the degradation rate is up to 88 percent after 24 hours. When the dosage of the nano calcium carbonate is low enough, the air permeability of the breathable film is reduced sharply; but when the ratio of the plastic particle dosage to the nanometer calcium carbonate dosage is (5-6): 1, the air permeability can still reach more than 6500; therefore, the ratio of the plastic particles to the nano calcium carbonate is preferably (4-1): 1.
On the basis of the experimental results, the influence of the organic antibacterial agent on the impact strength, the air permeability and the degradation rate of the plastic film is inspected, and the inspection results show that the benzalkonium bromide in the quaternary ammonium salt antibacterial agent hardly influences the impact strength, the air permeability and the degradation rate; the 3- (methyldiethoxysilyl) propyldecyl dimethyl ammonium chloride (QADESD for short) reduces the air permeability, but still can reach 7500g/m 2 * Over 24 hours. The 3-epoxypropyl-5, 5-dimethyl hydantoin in the halamine antibacterial agent has obviously reduced impact strength, but the impact strength is obviously better than that of 1, 3-dichloro-5, 5-dimethyl hydantoin. Chlorhexidine and polyhexamethylene biguanide hydrochloride in the guanidine class show excellent characteristics in the aspects of impact strength, air permeability and degradation rate.
The antibacterial effects of quaternary ammonium salt, halamine and guanidine organic antibacterial agents are examined, and the antibacterial effects of an antibacterial plastic film, the antibacterial plastic film which is hot-pressed on a pure cotton fabric for 24 hours and washed for 30 times, 50 times, 70 times and 90 times are respectively shown: the benzalkonium bromide washability of the quaternary ammonium salt antibacterial agent is obviously lower than that of QADIED, the bacteriostatic activity of the plastic film on Candida albicans and smooth yeast is reduced from 0 grade to 1 grade after the plastic film is hot-pressed to the pure cotton fabric and washed for 30 times, the inhibition effect on the Candida albicans and the smooth yeast shows obvious difference along with the increase of the washing times, and the inhibition effect on the smooth yeast is lower than that of the Candida albicans. The bacteriostatic effect of the 3-epoxypropyl-5, 5-dimethylhydantoin in the halamine antibacterial agent is obviously lower than that of 1, 3-dichloro-5, 5-dimethylhydantoin, but the flexibility of the 1, 3-dichloro-5, 5-dimethylhydantoin is poor, so that the 3-epoxypropyl-5, 5-dimethylhydantoin is not an ideal antibacterial agent in the compounding process. Chlorhexidine and polyhexamethylene biguanide hydrochloride in guanidines show superior characteristics in all respects, but when washed 90 times they still show a significant difference in their antibacterial performance against candida albicans and glabrous yeast, chlorhexidine has a lower wash resistance than polyhexamethylene biguanide, and low concentrations of polyhexamethylene biguanide (washed 90 times) have a weaker inhibitory effect against candida albicans than against glabrous yeast.
Based on the investigation of the antibacterial effect of the organic antibacterial agent, QADESD, chlorhexidine and polyhexamethylene biguanide hydrochloride which have excellent antibacterial effect and washability are compounded with the stepless antibacterial agent, after the compounds are compounded, the performances of the QADESD, the chlorhexidine and the polyhexamethylene biguanide hydrochloride are different, when the proportion of the organic antibacterial agent to the inorganic antibacterial agent is 8; however, no significant difference was found when the ratio was in the range of (6-2): 1. The compatibility of the chlorhexidine and the zinc oxide is unexpected when the ratio is 4. Thus, the preferred organic antimicrobial agent is 3- (methyldiethoxysilyl) propyldecyldimethylammonium chloride (QADIDS) or chlorhexidine or polyhexamethylene biguanide; when the organic antibacterial agent is chlorhexidine, the inorganic antibacterial agent is a nano silver ion antibacterial agent; the mass ratio of the organic antibacterial agent to the inorganic antibacterial agent is preferably (6-2) to 1; preferably the nanoparticles are less than 30nm in size.
The invention has the beneficial effects that firstly, the breathable film is provided, the toughness, the air permeability and the degradability of the breathable film are better, and secondly, the antibacterial breathable film is provided, and has excellent softness, air permeability and degradability, and also has better antibacterial performance on candida albicans and bacteria, so that the breathable film is more suitable for adult female underpants, and certainly, the breathable film is a good choice for disposable articles such as adult paper diapers and baby paper diapers.
Melt index (MFI) is the amount of thermoplastic material extruded in a given time period under defined conditions, i.e.the mass of the melt passing through a standard die capillary per 10min, in g/10min.
Detailed Description
Materials for use in the present application
1. Coli medium (EMB) (eosin methylene blue agar-finished medium): peptone 10g, lactose 5g, K 2 HPO 4 2g, eosin Y0.4 g, methylene blue 0.065g, water 1000ml, pH 7.2,8 lbs. 15 min for sterilization.
2. Staphylococcus selective medium (Mannitol salt agar high-salt Mannitol): beef extract 1.0g, peptone 10.0g, naCl 75.0g, mannitol 10.0g, phenol red 0.025g, agar 15.0g, distilled water 1000ml, pH 7.5,8 pounds for 15 minutes.
3. Candida albicans and candida glabrata: peptone 15.0g, agar 15.0g, glucose 11.0g, mixed pigment 2g, inhibitor 1.0g, distilled water 1000ml, final pH 6.1 + -0.2, and sterilization at 121 ℃ for 20 minutes.
4. The polyolefin-based resin used herein is defined as a polymer a: selected from polyethylene acrylic acid, the MFI value is 2 g/10min (the test condition is 190 ℃,2.16 Kg) and the density is 0.96-1 g/mL.
5. The polyester-based resin used herein is defined as polymer b: selected from the group consisting of polybutylene terephthalate adipate (PBAT resin) and Polyhydroxyalkanoate (PHA).
(1) The performance parameters of PBAT were: the crystallinity is 26-29%, the crystallization temperature is 108-111 ℃, the melting point is 126-133 ℃, and the density is 1.21-1.29 g/ml.
(2) PHA resin has a melt index of 9g/10min (190 ℃ C., 2.16 Kg), a melting point of 120 ℃. + -. 5 ℃ C., and a crystallinity of 15-20%.
6. The polyamide-based resin used herein is defined as polymer c: selected from nylon film (PA), and carboxyl-terminated polyester-amides formed from terephthalic acid, hexamethylenediamine and ethylene glycol, herein denoted as polyester-amide b.
(1) The nylon film (PA) has a density of 1.03-1.11g/cm 3 。
(2) The ratio of the polyesteramide b to the carboxyl, amino and hydroxyl is (5-8) to 1; the polyesteramide used has an average molecular weight of 500-1000, a melting point of 100-140 ℃ and a viscosity of 1-1.75dL/g.
7. The plastic particles in the present application refer to the total amount of polymers a, b, c.
8. Antimicrobial agents useful herein include organic and inorganic antimicrobial agents: the organic antibacterial agent includes quaternary ammonium salt antibacterial agent, halamine compound antibacterial agent, and organic guanidine antibacterial agent; the inorganic antibacterial agent comprises silver ion antibacterial agent and nano zinc oxide.
9. The preparation method of the antibacterial breathable film comprises the following steps: adding an organic antibacterial agent and/or an inorganic antibacterial agent, a dispersing lubricant and an antioxidant into equipment, and uniformly mixing; adding plastic particles into a main feeding hole, adding mixed powder into a side feeding hole, adjusting the feeding speed of the main feeding hole, extruding, mixing, casting, stretching and cooling the molten plastic particles and the mixed powder, wherein the extrusion temperature is 170-190 ℃, the stretching temperature is 50-70 ℃, the stretching ratio is 2, the setting temperature is 90 +/-2 ℃, and the film is rolled and cut to obtain the antibacterial breathable film.
10. The silver ion antibacterial agents used in the examples of the present application are: silver nitrate, silver protein, silver sulfadiazine, and nano silver with particle size less than 30nm.
11. The particle size of the nano zinc oxide used in the embodiment of the application is less than 30nm.
12. In order to make the breathable film more easily conformable to the fabric, and soft and comfortable, the film thickness is selected to be no more than 35 μm.
Detection method used in the present application
1. The inhibition effect on escherichia coli, staphylococcus and enterococcus is detected by a national standard GB/T31402-2015 sticking film method: the bacteria are inoculated to a plate culture medium, and viable bacteria culture is carried out after the bacteria are covered with a film and stored for 24 hours. Comparing the parallel experiment results of the vacant samples to obtain the antibacterial rate of the antibacterial plastic; the strain used by the escherichia coli is NCIB8545; the strain used for Staphylococcus aureus was NCIB8625.
2. Inhibition of candida albicans (ATCC 10231) and candida glabrata (ATCC 2001) a plastic mildew resistance test "quantitative test method for antibacterial activity of antibacterial textiles (including nonwoven fabrics)" (ISO 20743 2021) was used, and the mildew resistance ratings were 0, 1, 2, 3 grades. The highest mildew-proof grade is 0 grade, and no mildew growth is observed when the sample is amplified by 50 times when the result is judged.
3. The tensile strength and the elongation at break are respectively detected according to the method specified in GB/T1040.3-2006; and the method specified in GB/T8809-2015.
4. The air permeability was measured according to the protocol of GB/T1037-2021 "measurement of Water vapor permeability of Plastic films and sheets".
5. The biodegradation performance refers to GB/T19277.1-2011, compost degradation tests are carried out on the materials, the sample materials and compost inoculum are mixed and then placed into a composting container, a full composting test is carried out under the conditions of 21% of oxygen content, 58 +/-2 ℃ and 50-55% of humidity, the ratio of the release amount of carbon dioxide after the materials are degraded for 6 months to a theoretical value is set in the test, and the biodegradation rate is calculated.
Test example 1 selection of the type of Plastic particle in breathable film
Since a coating layer or a hot-press film used as an underwear requires good softness, air permeability, and degradability, the influence of the compatibility of the polymer on tensile strength, impact strength, air permeability, and degradability was examined. The test mainly examines the types and the use amounts of the plastic particles on the tensile strength, the impact strength, the air permeability and the degradability of the plastic film.
In addition, in test example 1, the ratio of the amount of the plastic particles to the amount of the nano calcium carbonate is 1, the ratio of the amounts is a mass ratio, and the amount of the antioxidant is 0.05-0.5%.
Test example 1.1
The plastic particles used in test example 1.1 were polymer a, polyethylene acrylic acid, polymer b, PBAT, polymer c, nylon, and the proportions of the polymers are shown in table 1:
tensile strength, elongation at break, impact strength, air permeability and degradability of test examples 1.11 to 1.15 were measured, and the data are shown in Table 2:
the data in Table 2 show that the impact strength decreases with more polymer b, the degradation rate increases with more polymer b, and the air permeability does not change much, so that the amount of polymer b used is 3% to 15% in order to maintain sufficient flexibility. A significant reduction in the degradability when no polymer b was added was also investigated in this experiment. When the polymers a and c are the main components of the breathable film, in order to take account of flexibility and air permeability, the dosage of the polymer a is between 40 and 50 percent, the dosage of the polymer c is between 30 and 45 percent, and the total dosage of the polymers a, b and c in the plastic particles is 100 percent.
Test example 1.2
Experimental example 1.21-Experimental example 1.25 differs from Experimental example 1.1 in that the polymer b is PHA. Tensile strength, elongation at break, impact strength, air permeability and degradability of test examples 1.21 to 1.25 were measured, and the data are shown in Table 3:
comparing tables 2 and 3, it can be seen that tensile strength, elongation at break and impact strength are enhanced, i.e., toughness is improved, but air permeability is significantly reduced and degradation rate is slightly increased, when PBAT is replaced with PHA. The inference may be that the intramolecular as well as intermolecular forces are enhanced because the hydroxyl and oxygen content of PHA per unit mass of molecule is higher than that of PBAT.
Test example 1.3
Test example 1.31-test example 1.35 different from test examples 1.11-1.15 in that polymer c was a polyesteramide b.
Tensile strength, elongation at break, impact strength, air permeability and degradability of test examples 1.31 to 1.35 were measured, and the data are shown in Table 4:
comparing table 2 and table 4, it is most obvious that the air permeability is significantly better than experimental example 1.1, which illustrates that polyester-amide b is significantly better than nylon in improving air permeability; still exhibit effects comparable to those of the experimental examples in terms of their flexibility; meanwhile, the average degradation rate is slightly better than that of the experimental examples and 1.2.
Test example 1.4
Examples 1.41 to 1.45 differ from examples 1.11 to 1.15 in that polymer b is PHA and polymer c is polyesteramide b.
Tensile strength, elongation at break, impact strength, air permeability and degradability of test examples 1.41 to 1.45 were measured, and the data are shown in table 5:
comparison of tables 3 and 4 and table 5 shows that the increase of the oxygen content in the polymer molecule can improve the overall toughness, and the increase of the intermolecular force can also reduce the air permeability, but the increase of the ester groups and the amide groups can enhance the degradation rate. When the polymers a, b and c are compounded, the total effect is that the polyethylene acrylic acid + PBAT + polyesteramide b is more than the polyethylene acrylic acid + PHA + polyesteramide b is more than the polyethylene acrylic acid + PBAT + nylon. When the content of the polymer a or the polymer c is lower than 40 percent without adding polymerization, the flexibility is obviously reduced, the addition of the polymer b can improve the degradability while ensuring the flexibility, and the combination of the polymer a, the polymer b and the polymer c can fully show that the flexibility and the degradability can be simultaneously considered.
Test example 2 examination of the amount of the nano calcium carbonate
The nano calcium carbonate is added in an amount too large as the inorganic nanoparticles to improve the air permeability of the breathable film, and may cause dispersion unevenness and decrease in the toughness of the film. This experiment was therefore designed to investigate the air permeability and impact strength of the films.
Test example 2.1 polymers a, b, c polyacrylic acid + PBAT + polyesteramide b, their dosage ratio is 45:
comparing the results of test examples 2.1-2.3 and test example 1.3, when the ratio of the amount of plastic particles to the amount of nano calcium carbonate was in the range of (4-1): 1, the air permeability of the breathable film increased with the increase in the amount of calcium carbonate, but it was shown that the air permeability was mainly affected by the plastic particles, and when the amount of nano calcium carbonate was sufficiently low, the air permeability of the breathable film decreased sharply; but when the ratio of the plastic particle dosage to the nanometer calcium carbonate dosage is (5-6): 1, the air permeability can still reach over 6500; the degradation rate of the breathable film is also influenced by the amount of calcium carbonate, but the change trend is not obvious, which indicates that the degradation performance of the breathable film is mainly dependent on the properties of the film. Therefore, the dosage ratio of the plastic particles to the nano calcium carbonate is (4-1): 1
Example 1
The plastic particle polymer a is polyethylene acrylic acid, the polymer b is PBAT, the polymer c is polyesteramide b is a material for forming the plastic particle, the mixture ratio of the components is 45; the dosage of the calcium carbonate is 40 percent, the dosage of the antioxidant is 0.5 percent, the antibacterial agent is an organic antibacterial agent, the dosage is 5 percent, 10 percent and 15 percent, and the organic antibacterial agents in the examples 1.1 to 1.6 are benzalkonium bromide (dodecyl dimethyl benzyl ammonium bromide) and 3- (methyl diethoxy silane) propyl decyl dimethyl ammonium chloride (QADESD for short, and the relative molecular mass is 395.5); 3-epoxypropyl-5, 5-dimethylhydantoin, 1, 3-dichloro-5, 5-dimethylhydantoin; chlorhexidine and polyhexamethylene biguanide hydrochloride (PHMB).
The effect of the organic antibacterial agent on flexibility, air permeability and degradation rate is 10% as an example, and the specific results are shown in table 7:
benzalkonium bromide in quaternary ammonium salt antibacterial agent has impact strength and penetrabilityThe gas rate and the degradation rate have almost no influence; QADIED reduced the air permeability, but still reached 7500g/m 2 * Over 24 hours. The 3-epoxypropyl-5, 5-dimethyl hydantoin in the halamine antibacterial agent has obviously reduced impact strength, but the impact strength is obviously better than that of 1, 3-dichloro-5, 5-dimethyl hydantoin. Chlorhexidine and polyhexamethylene biguanide hydrochloride in guanidines show excellent characteristics in all aspects.
The results of examining the antibacterial rate of the antibacterial breathable films of the present application and the antibacterial ability of the antibacterial breathable films of the present application to escherichia coli, staphylococcus aureus, candida albicans and glabrous yeast 24h, 30 times, 50 times, 70 times and 90 times after the films are combined on long-stapled cotton fabrics are respectively shown in tables 8-13:
comparing tables 8-13, the following conclusions are drawn: (1) When the antibacterial breathable film is hot-pressed on the textile fabric, the antibacterial property of the textile fabric is lost to different degrees. (2) Benzalkonium bromide has poor washfastness compared with QADIED, but has no significant difference when the washing times are 70-90; and after 70 washes, the inhibitory activity against candida albicans was significantly weaker than that against glabrous yeast. (3) The antibacterial property of the halamine 3-epoxypropyl-5, 5-dimethylhydantoin is obviously lower than that of 1, 3-dichloro-5, 5-dimethylhydantoin, and the effects on candida albicans and glabrous saccharomycetes also show obvious difference; but in combination with table 7 shows that 3-epoxypropyl-5, 5-dimethylhydantoin has significantly higher toughness (impact strength) than 1, 3-dichloro-5, 5-dimethylhydantoin. (4) Chlorhexidine in guanidines has a lower wash resistance than polyhexamethylene biguanide, and low concentrations of polyhexamethylene biguanide (90 washes) have a weaker inhibitory effect on candida albicans than on torula glabra.
When different antibacterial concentrations of the organic antibacterial agent are inspected, the antibacterial property of a simple membrane is not significantly different from that of a pure cotton fabric after the antibacterial concentration is lower than 5%, but the antibacterial property of the pure cotton fabric is significantly lower than 10% through statistical analysis after the pure cotton fabric is poured by hot pressing; while QADIED, chlorhexidine, and polyhexamethylene biguanide hydrochloride do not significantly increase the antimicrobial effect at organic antimicrobial concentrations greater than 15%, QADIED significantly reduces the gas permeability of the film.
Example 2
The method is characterized in that QADESD, chlorhexidine and polyhexamethylene biguanide hydrochloride which are excellent in performance in example 1 are further improved, and different from example 1, an inorganic antibacterial agent is further added into an antibacterial breathable film, because the inorganic antibacterial agent is not washable, is easy to melt out, and has no dispersibility as an organic antibacterial agent, a small amount of the inorganic antibacterial agent is added on the basis of the organic antibacterial agent, the total dosage of the organic antibacterial agent and the inorganic antibacterial agent is 10%, the mass ratio is respectively set as 8.
Example 2.1 nano silver nitrate 4
The antibacterial effects are shown in the following tables 14-19 in sequence:
the compound of the organic antibacterial agent and the inorganic antibacterial agent is considered to find that the inhibition effect on fungi after the compound is obviously improved, and it is worth mentioning that when the proportion of the organic antibacterial agent to the inorganic antibacterial agent is 8, and after the compound is washed for 70 times, the inhibition effect of the chlorhexidine on the candida albicans and the effect on the smooth yeast have significant difference, and the inhibition effect on the smooth yeast is significantly lower than the inhibition effect on the candida albicans; however, no significant difference was found when the ratio was in the range of (6-2): 1.
Example 2.2
In contrast to example 2.1, nano-zinc oxide was used and the results are shown in tables 20-25:
as can be seen from comparison of tables 20-25, when the chlorhexidine and the zinc oxide are compatible, the compatibility of 4.
The test examples and examples are only for the purpose of explaining the content of the study of the present application and are not intended to limit the present application as long as they are protected by the patent laws within the scope of the claims of the present application.
Claims (9)
1. The antibacterial breathable film is prepared from the following raw materials of plastic particles, nano calcium carbonate, an organic antibacterial agent and an inorganic antibacterial agent, and is characterized in that:
the plastic particles comprise a polymer a, a polymer b and a polymer c, wherein the polymer a is polyethylene acrylic acid; the polymer b is PHA or PBAT or any combination thereof;
the polymer c is nylon or polyester amide, and the ratio of the polyester amide in terms of the number of carboxyl, amino and hydroxyl is (5-8): 1;
the polyesteramide has average molecular weight of 500-1000, melting point of 100-140 deg.c and viscosity of 1-1.75dL/g;
the organic antibacterial agent is three organic antibacterial agents of quaternary ammonium salt, halamine and guanidine.
2. The antibacterial breathable film according to claim 1, wherein the mass ratio of the plastic particles to the nano calcium carbonate is (4-1): 1.
3. The antimicrobial breathable film of claim 1, wherein: the dosage of the polymer a is between 40 and 50 percent; the amount of the polymer b is 3-15%; the dosage of the polymer c is 30-45%, and the total dosage of the polymers a, b and c in the plastic particles is 100%.
4. The antimicrobial breathable film of claim 1, wherein: the polymer b is PBAT, the crystallinity of the PBAT is 26-29%, the crystallization temperature is 108-111 ℃, the melting point is 126-133 ℃, and the density is 1.21-1.29 g/ml.
5. The antimicrobial breathable film of claim 1, wherein: the polymer c is polyester amide, the polyester amide is carboxyl-terminated polyester amide formed by terephthalic acid, hexamethylene diamine and ethylene glycol, and the ratio of the carboxyl, the amine and the hydroxyl is (5-8) to 1; the polyesteramide used has an average molecular weight of 500-1000, a melting point of 100-140 ℃ and a viscosity of 1-1.75dL/g.
6. The antimicrobial breathable film of claim 1, wherein: the organic antibacterial agent is 3- (methyldiethoxysilyl) propyl decyl dimethyl ammonium chloride or polyhexamethylene biguanide.
7. The antimicrobial breathable film of claim 1, wherein: the inorganic antibacterial agent is a silver ion or zinc oxide antibacterial agent.
8. The antimicrobial breathable film of claim 1, wherein: the mass ratio of the organic antibacterial agent to the inorganic antibacterial agent is (6-2) to 1.
9. The antimicrobial breathable film of claim 7, wherein: the inorganic antibacterial agent is a nano silver ion antibacterial agent.
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| CN101724284A (en) * | 2008-10-31 | 2010-06-09 | 中国石油化工股份有限公司 | Anti-bacterial thermoplastic composite and preparation method thereof |
| CN102482404A (en) * | 2009-09-03 | 2012-05-30 | Co2斯塔奇私人有限公司 | Polymer/thermoplastic starch compositions |
| CN103013071A (en) * | 2012-12-18 | 2013-04-03 | 江苏华信塑业发展有限公司 | Biodegradable PHA (polyhydroxyalkanoate) breathable membrane and preparation method thereof |
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| CN115772290B (en) | 2023-05-23 |
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Denomination of invention: An antibacterial breathable film Effective date of registration: 20230927 Granted publication date: 20230523 Pledgee: Bank of China Limited by Share Ltd. Cangzhou branch Pledgor: Hebei Haide Plastic Industry Co.,Ltd. Registration number: Y2023980059325 |